void dh_info(FILE * infile, FILE * outfile, common_info_st * ci)
{
gnutls_datum_t params;
size_t size;
int ret, ret2;
gnutls_dh_params_t dh_params;
gnutls_datum_t p, g;
unsigned int q_bits = 0;
fix_lbuffer(0);
if (gnutls_dh_params_init(&dh_params) < 0) {
fprintf(stderr, "Error in dh parameter initialization\n");
exit(1);
}
params.data = (void *) fread_file(infile, &size);
params.size = size;
ret =
gnutls_dh_params_import_pkcs3(dh_params, ¶ms,
ci->incert_format);
if (ret < 0) {
/* Try DSA */
ret2 = import_dsa_dh(dh_params, ¶ms, ci->incert_format);
if (ret2 < 0) {
fprintf(stderr, "Error parsing dh params: %s\n",
gnutls_strerror(ret));
exit(1);
}
}
ret = gnutls_dh_params_export_raw(dh_params, &p, &g, &q_bits);
if (ret < 0) {
fprintf(stderr, "Error exporting parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
if (ci->outcert_format == GNUTLS_X509_FMT_PEM)
print_dh_info(outfile, &p, &g, q_bits, ci->cprint);
if (!ci->cprint) { /* generate a PKCS#3 structure */
size_t len = lbuffer_size;
ret =
gnutls_dh_params_export_pkcs3(dh_params,
ci->outcert_format,
lbuffer, &len);
if (ret == 0) {
if (ci->outcert_format == GNUTLS_X509_FMT_PEM) {
fprintf(outfile, "\n%s", lbuffer);
} else {
fwrite(lbuffer, 1, len, outfile);
}
} else {
fprintf(stderr, "Error: %s\n",
gnutls_strerror(ret));
}
}
gnutls_free(p.data);
gnutls_free(g.data);
gnutls_dh_params_deinit(dh_params);
}
int
print_info (gnutls_session_t session, const char *hostname, int insecure)
{
const char *tmp;
gnutls_credentials_type_t cred;
gnutls_kx_algorithm_t kx;
/* print the key exchange's algorithm name
*/
kx = gnutls_kx_get (session);
cred = gnutls_auth_get_type (session);
switch (cred)
{
#ifdef ENABLE_ANON
case GNUTLS_CRD_ANON:
print_dh_info (session, "Anonymous ");
break;
#endif
#ifdef ENABLE_SRP
case GNUTLS_CRD_SRP:
/* This should be only called in server
* side.
*/
if (gnutls_srp_server_get_username (session) != NULL)
printf ("- SRP authentication. Connected as '%s'\n",
gnutls_srp_server_get_username (session));
break;
#endif
#ifdef ENABLE_PSK
case GNUTLS_CRD_PSK:
/* This returns NULL in server side.
*/
if (gnutls_psk_client_get_hint (session) != NULL)
printf ("- PSK authentication. PSK hint '%s'\n",
gnutls_psk_client_get_hint (session));
/* This returns NULL in client side.
*/
if (gnutls_psk_server_get_username (session) != NULL)
printf ("- PSK authentication. Connected as '%s'\n",
gnutls_psk_server_get_username (session));
if (kx == GNUTLS_KX_DHE_PSK)
print_dh_info (session, "Ephemeral ");
break;
#endif
case GNUTLS_CRD_IA:
printf ("- TLS/IA authentication\n");
break;
case GNUTLS_CRD_CERTIFICATE:
{
char dns[256];
size_t dns_size = sizeof (dns);
unsigned int type;
/* This fails in client side */
if (gnutls_server_name_get (session, dns, &dns_size, &type, 0) == 0)
{
printf ("- Given server name[%d]: %s\n", type, dns);
}
}
if (kx == GNUTLS_KX_DHE_RSA || kx == GNUTLS_KX_DHE_DSS)
print_dh_info (session, "Ephemeral ");
print_cert_info (session, hostname, insecure);
print_cert_vrfy (session);
}
tmp = SU (gnutls_protocol_get_name (gnutls_protocol_get_version (session)));
printf ("- Version: %s\n", tmp);
tmp = SU (gnutls_kx_get_name (kx));
printf ("- Key Exchange: %s\n", tmp);
tmp = SU (gnutls_cipher_get_name (gnutls_cipher_get (session)));
printf ("- Cipher: %s\n", tmp);
tmp = SU (gnutls_mac_get_name (gnutls_mac_get (session)));
printf ("- MAC: %s\n", tmp);
tmp = SU (gnutls_compression_get_name (gnutls_compression_get (session)));
printf ("- Compression: %s\n", tmp);
if (verbose)
{
char id[32];
size_t id_size = sizeof (id);
gnutls_session_get_id (session, id, &id_size);
printf ("- Session ID: %s\n", raw_to_string (id, id_size));
}
fflush (stdout);
return 0;
}
/* If how is zero then the included parameters are used.
*/
int generate_prime(FILE * outfile, int how, common_info_st * info)
{
int ret;
gnutls_dh_params_t dh_params;
gnutls_datum_t p, g;
int bits = get_bits(GNUTLS_PK_DH, info->bits, info->sec_param, 1);
unsigned int q_bits = 0, key_bits = 0;
fix_lbuffer(0);
gnutls_dh_params_init(&dh_params);
if (how != 0) {
fprintf(stderr, "Generating DH parameters (%d bits)...\n",
bits);
fprintf(stderr, "(might take long time)\n");
} else
fprintf(stderr, "Retrieving DH parameters...\n");
if (how != 0) {
if (info->provable != 0) {
gnutls_x509_privkey_t pkey;
unsigned save;
ret = gnutls_x509_privkey_init(&pkey);
if (ret < 0) {
fprintf(stderr,
"Error initializing key: %s\n",
gnutls_strerror(ret));
exit(1);
}
if (info->seed_size > 0) {
gnutls_keygen_data_st data;
if (info->seed_size < 32) {
fprintf(stderr, "For DH parameter generation a 32-byte seed value or larger is expected (have: %d); use -d 2 for more information.\n", (int)info->seed_size);
exit(1);
}
data.type = GNUTLS_KEYGEN_SEED;
data.data = (void*)info->seed;
data.size = info->seed_size;
ret = gnutls_x509_privkey_generate2(pkey, GNUTLS_PK_DSA, bits, GNUTLS_PRIVKEY_FLAG_PROVABLE, &data, 1);
} else {
ret = gnutls_x509_privkey_generate(pkey, GNUTLS_PK_DSA, bits, GNUTLS_PRIVKEY_FLAG_PROVABLE);
}
if (ret < 0) {
fprintf(stderr,
"Error generating DSA parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
if (info->outcert_format == GNUTLS_X509_FMT_PEM) {
save = info->no_compat;
info->no_compat = 1;
print_private_key(outfile, info, pkey);
info->no_compat = save;
}
ret = gnutls_dh_params_import_dsa(dh_params, pkey);
if (ret < 0) {
fprintf(stderr,
"Error importing DSA parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
gnutls_x509_privkey_deinit(pkey);
} else {
ret = gnutls_dh_params_generate2(dh_params, bits);
if (ret < 0) {
fprintf(stderr,
"Error generating parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
}
ret =
gnutls_dh_params_export_raw(dh_params, &p, &g,
&q_bits);
if (ret < 0) {
fprintf(stderr, "Error exporting parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
} else {
if (info->provable != 0) {
fprintf(stderr, "The DH parameters obtained via this option are not provable\n");
exit(1);
}
#if defined(ENABLE_DHE) || defined(ENABLE_ANON)
if (bits <= 2048) {
p = gnutls_ffdhe_2048_group_prime;
g = gnutls_ffdhe_2048_group_generator;
key_bits = gnutls_ffdhe_2048_key_bits;
bits = 2048;
} else if (bits <= 3072) {
p = gnutls_ffdhe_3072_group_prime;
g = gnutls_ffdhe_3072_group_generator;
key_bits = gnutls_ffdhe_3072_key_bits;
bits = 3072;
} else if (bits <= 4096) {
p = gnutls_ffdhe_4096_group_prime;
g = gnutls_ffdhe_4096_group_generator;
key_bits = gnutls_ffdhe_4096_key_bits;
bits = 4096;
} else {
p = gnutls_ffdhe_8192_group_prime;
g = gnutls_ffdhe_8192_group_generator;
key_bits = gnutls_ffdhe_8192_key_bits;
bits = 8192;
}
ret = gnutls_dh_params_import_raw2(dh_params, &p, &g, key_bits);
if (ret < 0) {
fprintf(stderr, "Error exporting parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
#elif defined(ENABLE_SRP)
if (bits <= 1024) {
p = gnutls_srp_1024_group_prime;
g = gnutls_srp_1024_group_generator;
bits = 1024;
} else if (bits <= 1536) {
p = gnutls_srp_1536_group_prime;
g = gnutls_srp_1536_group_generator;
bits = 1536;
} else if (bits <= 2048) {
p = gnutls_srp_2048_group_prime;
g = gnutls_srp_2048_group_generator;
bits = 2048;
} else if (bits <= 3072) {
p = gnutls_srp_3072_group_prime;
g = gnutls_srp_3072_group_generator;
bits = 3072;
} else {
p = gnutls_srp_4096_group_prime;
g = gnutls_srp_4096_group_generator;
bits = 4096;
}
ret = gnutls_dh_params_import_raw(dh_params, &p, &g);
if (ret < 0) {
fprintf(stderr, "Error exporting parameters: %s\n",
gnutls_strerror(ret));
exit(1);
}
#else
fprintf(stderr,
"Parameters unavailable as SRP is disabled.\n");
exit(1);
#endif
}
if (info->outcert_format == GNUTLS_X509_FMT_PEM)
print_dh_info(outfile, &p, &g, q_bits, info->cprint);
if (!info->cprint) { /* generate a PKCS#3 structure */
size_t len = lbuffer_size;
ret =
gnutls_dh_params_export_pkcs3(dh_params,
info->outcert_format,
lbuffer, &len);
if (ret == 0) {
if (info->outcert_format == GNUTLS_X509_FMT_PEM)
fprintf(outfile, "\n%s", lbuffer);
else
fwrite(lbuffer, 1, len, outfile);
} else {
fprintf(stderr, "Error: %s\n",
gnutls_strerror(ret));
}
}
if (how != 0) {
gnutls_free(p.data);
gnutls_free(g.data);
}
gnutls_dh_params_deinit(dh_params);
return 0;
}
int
print_info (gnutls_session_t session, const char *hostname, int insecure)
{
const char *tmp;
gnutls_credentials_type_t cred;
gnutls_kx_algorithm_t kx;
/* print the key exchange's algorithm name
*/
kx = gnutls_kx_get (session);
cred = gnutls_auth_get_type (session);
switch (cred)
{
#ifdef ENABLE_ANON
case GNUTLS_CRD_ANON:
print_dh_info (session, "Anonymous ");
break;
#endif
#ifdef ENABLE_SRP
case GNUTLS_CRD_SRP:
/* This should be only called in server
* side.
*/
if (gnutls_srp_server_get_username (session) != NULL)
printf ("- SRP authentication. Connected as '%s'\n",
gnutls_srp_server_get_username (session));
break;
#endif
#ifdef ENABLE_PSK
case GNUTLS_CRD_PSK:
/* This returns NULL in server side.
*/
if (gnutls_psk_client_get_hint (session) != NULL)
printf ("- PSK authentication. PSK hint '%s'\n",
gnutls_psk_client_get_hint (session));
/* This returns NULL in client side.
*/
if (gnutls_psk_server_get_username (session) != NULL)
printf ("- PSK authentication. Connected as '%s'\n",
gnutls_psk_server_get_username (session));
if (kx == GNUTLS_KX_DHE_PSK)
print_dh_info (session, "Ephemeral ");
break;
#endif
case GNUTLS_CRD_IA:
printf ("- TLS/IA authentication\n");
break;
case GNUTLS_CRD_CERTIFICATE:
{
char dns[256];
size_t dns_size = sizeof (dns);
unsigned int type;
/* This fails in client side */
if (gnutls_server_name_get (session, dns, &dns_size, &type, 0) == 0)
{
printf ("- Given server name[%d]: %s\n", type, dns);
}
}
if (kx == GNUTLS_KX_DHE_RSA || kx == GNUTLS_KX_DHE_DSS)
print_dh_info (session, "Ephemeral ");
print_cert_info (session, hostname, insecure);
print_cert_vrfy (session);
}
tmp = SU (gnutls_protocol_get_name (gnutls_protocol_get_version (session)));
printf ("- Version: %s\n", tmp);
tmp = SU (gnutls_kx_get_name (kx));
printf ("- Key Exchange: %s\n", tmp);
tmp = SU (gnutls_cipher_get_name (gnutls_cipher_get (session)));
printf ("- Cipher: %s\n", tmp);
tmp = SU (gnutls_mac_get_name (gnutls_mac_get (session)));
printf ("- MAC: %s\n", tmp);
tmp = SU (gnutls_compression_get_name (gnutls_compression_get (session)));
printf ("- Compression: %s\n", tmp);
if (verbose)
{
char id[32];
size_t id_size = sizeof (id);
gnutls_session_get_id (session, id, &id_size);
printf ("- Session ID: %s\n", raw_to_string (id, id_size));
}
if (verbose)
{
gnutls_datum cb;
int rc;
rc =
gnutls_session_channel_binding (session, GNUTLS_CB_TLS_UNIQUE, &cb);
if (rc)
fprintf (stderr, "Channel binding error: %s\n", gnutls_strerror (rc));
else
{
size_t i;
printf ("- Channel binding 'tls-unique': ");
for (i = 0; i < cb.size; i++)
printf ("%02x", cb.data[i]);
printf ("\n");
}
}
/* Warning: Do not print anything more here. The 'Compression:'
output MUST be the last non-verbose output. This is used by
Emacs starttls.el code. */
fflush (stdout);
return 0;
}
